| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,533 |
| Official European Union Languages | 0 | - | 4.97 | 236,376 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,610 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 526,052 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,639 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 424,910 |
| Slavic Languages | 0 | - | 4.67 | 53,933 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,489 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,533 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,018 |
| History of Russia Quiz | 0 | - | 4.49 | 31,774 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,273 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,345 |
| Most Spoken Languages in Canada | 0 | - | 4.91 | 54,546 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,226 |
| Celtic Nations | 0 | - | 4.69 | 46,797 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,787 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,589 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,582 |
| Countries with Territory in the Balkans | 0 | - | 4.96 | 88,168 |
| Eastern Europe Map Quiz | 0 | - | 4.91 | 127,080 |
| Slavic Countries | 0 | - | 4.96 | 110,779 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,016 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,258 |
| Top Asian Languages on a Map | 0 | - | 4.94 | 70,603 |
| Countries where Arabic is an Official Language | 0 | - | 4.85 | 72,218 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,270 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,120 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,129 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,660 |
| Countries Formerly in Yugoslavia | 0 | - | 4.95 | 124,109 |
| States of Germany | 0 | - | 4.96 | 149,819 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,921 |
| Regions of Italy | 0 | - | 4.92 | 74,607 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,743 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,156 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,064 |
| Champions League Winners | 0 | - | 4.92 | 995,228 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,101 |
| Geography of Russia | 0 | - | 4.57 | 21,418 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,486 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,689 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,393 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,265 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,002 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,933 |
| Croatia Country Quiz | 0 | - | 4.83 | 42,798 |
| Bosnia and Herzegovina Country Quiz | 0 | - | 4.86 | 35,002 |
| Departments of France | 0 | - | 4.93 | 52,683 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,344 |
| England or Wales? | 0 | - | 4.94 | 45,284 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,309 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,424 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,596 |
| Word Scramble - European Countries | 0 | - | 4.74 | 140,918 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,835 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,753 |
| Non-Bordering Countries Closest to Russia | 0 | - | 4.91 | 82,337 |
| Countries that Border Hungary | 0 | - | 4.98 | 103,620 |
| North Macedonia Country Quiz | 0 | - | 4.81 | 27,587 |
| Moldova Country Quiz | 0 | - | 4.81 | 30,519 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,492 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,288 |
| Name that Greek Letter | 0 | - | 4.94 | 321,456 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,419 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,228 |
| Languages of Spain | 0 | - | 4.36 | 23,135 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,366 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,351 |
| Famous Russians | 0 | - | 4.16 | 23,711 |
| Word Chain - Russia | 0 | - | 4.33 | 15,683 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,548 |
| Countries Bordering Ukraine, with an Empty Map | 0 | - | 4.86 | 95,842 |
| The Trojan War | 0 | - | 4.83 | 39,400 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,376 |
| History of Italy | 0 | - | 4.55 | 31,800 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,103 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 83,985 |
| Roman Emperors | 0 | - | 4.95 | 118,317 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,465 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,963 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 276,947 |
| Top 12 Languages Spoken in Asia | 0 | - | 4.39 | 32,413 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,317 |
| European Geography By Letter - B #1 | 0 | - | 4.64 | 110,828 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,766 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,638 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,164 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,786 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,624 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,586 |
| European Geography By Letter - V | 0 | - | 4.43 | 91,991 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,243 |
| Europe Map Quiz | 0 | - | 5.00 | 4,727,972 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,963 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,585 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,912 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,954 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,557 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,092 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,578 |
| Most Mentioned Allies of Russia | 0 | - | 4.49 | 37,773 |
| Most Mentioned Enemies of Russia | 0 | - | 4.69 | 89,515 |
| Capitals of French Regions | 0 | - | 4.45 | 15,979 |
| Regions of France | 0 | - | 4.78 | 119,050 |
| France Immigration by Country | 0 | - | 4.72 | 75,923 |
| Famous Germans | 0 | - | 4.50 | 54,566 |
| German Groups of Things | 0 | - | 4.46 | 38,291 |
| Capitals of German States | 0 | - | 4.74 | 28,797 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,079 |
| Germany True or False? | 0 | - | 4.61 | 48,508 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,400 |
| Olympian Gods Quiz | 0 | - | 4.96 | 494,980 |
| Ancient Greek Words | 0 | - | 4.92 | 110,558 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,260 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,739 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,027 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,870 |
| Name Every Beatles Song | 0 | - | 4.97 | 233,843 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,210 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,871 |
| Top World Languages | 0 | - | 4.92 | 812,131 |
| Africa Map Quiz | 0 | - | 5.00 | 2,102,961 |
| Official Languages of South Africa | 0 | - | 4.56 | 26,037 |
| Oceania Map Quiz | 0 | - | 4.98 | 634,576 |
| Australian Capitals | 0 | - | 4.92 | 62,586 |
| European Physical Geography | 0 | - | 4.26 | 33,366 |
| Czech Republic Country Quiz | 0 | - | 4.52 | 41,818 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,755 |
| Ukraine Country Quiz | 0 | - | 4.42 | 47,267 |
| Hungary Country Quiz | 0 | - | 4.49 | 42,983 |
| Romania Country Quiz | 0 | - | 4.63 | 53,306 |
| History of Austria | 0 | - | 4.70 | 17,738 |
| Geography of the French Empire | 0 | - | 4.48 | 26,915 |
| The French Revolution | 0 | - | 4.46 | 23,752 |
| France Multiple Choice | 0 | - | 4.38 | 40,621 |
| History of France | 0 | - | 4.59 | 55,901 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,372 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,157 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,554 |
| The Vikings! | 0 | - | 4.45 | 28,236 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,659 |
| The Portuguese Empire | 0 | - | 4.54 | 11,981 |
| American to British Word Translation | 0 | - | 4.06 | 117,014 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,169 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,381 |
| Champions League Top 4 | 0 | - | 4.77 | 133,547 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,438,374 |
| Asia Map Quiz | 0 | - | 4.99 | 906,016 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 32,510 |
| Countries by Official Language | 0 | - | 4.95 | 192,611 |
| Places in their Native Language #1 | 0 | - | 4.84 | 239,290 |
| Places in their Native Language #2 | 0 | - | 4.85 | 122,904 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 292,919 |
| Countries in their Native Language | 0 | - | 4.99 | 196,498 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,669 |
| Countries of Africa | 0 | - | 5.00 | 2,504,946 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,736 |
| African East Coast | 0 | - | 4.96 | 94,945 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,810 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,726 |
| Australia Map Quiz | 0 | - | 4.94 | 342,263 |
| United States Map Quiz | 0 | - | 4.98 | 4,139,931 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 209,867 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,161 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,763 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,096 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,153 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,395 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,841 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,214 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,434 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,110 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,886 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,268 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,375 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,475 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,364 |
| European Geography A-Z | 0 | - | 4.28 | 48,959 |
| Country Codes of Europe | 0 | - | 3.46 | 13,645 |
| The Only European Country ... | 0 | - | 4.91 | 213,536 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,347 |
| Embarrassing Chapters in Russian History | 0 | - | 3.73 | 20,228 |
| Latvia Country Quiz | 0 | - | 4.75 | 31,732 |
| Austria... or Australia? | 0 | - | 4.68 | 103,821 |
| Presidents of France | 0 | - | 4.25 | 23,868 |
| Word Chain - France | 0 | - | 4.38 | 42,568 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,742 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,754 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,705 |
| Italian Foods | 0 | - | 4.30 | 72,125 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,915 |
| The Mafia Quiz | 0 | - | 4.46 | 23,194 |
| History of The Netherlands | 0 | - | 4.46 | 17,299 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,952 |
| Canary Islands | 0 | - | 4.61 | 17,389 |
| Real Madrid 2010s Starting XI | 0 | - | 4.89 | 66,025 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,096 |
| British Spellings | 0 | - | 4.07 | 99,190 |
| British Groups of Things | 0 | - | 4.25 | 82,659 |
